Prevent breaking MemberExpression inside NewExpression (#3075)

* Test case

* Prevent breaking MemberExpression inside NewExpression

src/printer.js

@@ -418,8 +418,9 @@ function genericPrintNoParens(path, options, print, args) {
 
       const shouldInline =
         (firstNonMemberParent &&
-          ((firstNonMemberParent.type === "VariableDeclarator" &&
-            firstNonMemberParent.id.type !== "Identifier") ||
+          (firstNonMemberParent.type === "NewExpression" ||
+            (firstNonMemberParent.type === "VariableDeclarator" &&
+              firstNonMemberParent.id.type !== "Identifier") ||
             (firstNonMemberParent.type === "AssignmentExpression" &&
               firstNonMemberParent.left.type !== "Identifier"))) ||
         n.computed ||

tests/new_expression/__snapshots__/jsfmt.spec.js.snap

@@ -23,3 +23,28 @@ new (typeof this == "function" ? this : Dict())();
 new (createObj()).prop(a());
 
 `;
+
+exports[`with-member-expression.js 1`] = `
+function functionName() {
+  // indent to make the line break
+  if (true) {
+    this._aVeryLongVariableNameToForceLineBreak = new this.Promise(
+      (resolve, reject) => {
+        // do something
+      }
+    );
+  }
+}
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+function functionName() {
+  // indent to make the line break
+  if (true) {
+    this._aVeryLongVariableNameToForceLineBreak = new this.Promise(
+      (resolve, reject) => {
+        // do something
+      }
+    );
+  }
+}
+
+`;

tests/new_expression/with-member-expression.js

@@ -0,0 +1,10 @@
+function functionName() {
+  // indent to make the line break
+  if (true) {
+    this._aVeryLongVariableNameToForceLineBreak = new this.Promise(
+      (resolve, reject) => {
+        // do something
+      }
+    );
+  }
+}